{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/70368"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/70368","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Electron Spin Echo and Millimeter Wave Epr Studies of Disordered Solids","abstract":"Electron spin echo (ESE) spectroscopy has been used in the first section of this study to measure weak nitrogen hyperfine coupling in a series of pyridine derivatives loosely bound to bis(benzoylacetonato)copper (Cu(benzac)$\\sb2$) in solution. The ESE technique has also been employed to study weak, long range, unresolved, (matrix) hyperfine interactions in coal. Experimentally, electron nuclear double resonance (ENDOR) and continuous wave electron paramagnetic resonance (cw EPR) techniques are better suited to study strong short range ($$35 GHz) experiments should result in enhanced resolution or allow for more accurate determinations of the zero-field splitting energies in a high spin system. Single crystal spectra as well as doped powder spectra of a variety of copper and iron model compounds were examined using millimeter wave EPR. The exploratory experiments, performed at 4.2 K, made use of neither a sample cavity nor field modulation methods. Even so, the combination of low temperature and high field made it possible to record spectra in single scans.","abstract_html":"Electron spin echo (ESE) spectroscopy has been used in the first section of this study to measure weak nitrogen hyperfine coupling in a series of pyridine derivatives loosely bound to bis(benzoylacetonato)copper (Cu(benzac)$\\sb2$) in solution. The ESE technique has also been employed to study weak, long range, unresolved, (matrix) hyperfine interactions in coal. Experimentally, electron nuclear double resonance (ENDOR) and continuous wave electron paramagnetic resonance (cw EPR) techniques are better suited to study strong short range ($$35 GHz) experiments should result in enhanced resolution or allow for more accurate determinations of the zero-field splitting energies in a high spin system. Single crystal spectra as well as doped powder spectra of a variety of copper and iron model compounds were examined using millimeter wave EPR. The exploratory experiments, performed at 4.2 K, made use of neither a sample cavity nor field modulation methods. Even so, the combination of low temperature and high field made it possible to record spectra in single scans.","abstract_has_math":true,"creators":["Cornelius, Jeffrey Bernard"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Chemistry","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-15T23:18:58Z","date_published":"2014-12-15T23:18:58Z","updated_at":"2026-07-22T22:26:02Z","subjects":["Chemistry, Physical"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8721617"],"render_values":[{"text":"(UMI)AAI8721617","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/70368","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Cornelius, Jeffrey Bernard"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-15T23:18:58Z","10000-01-01","1987"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemistry"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Chemistry, Physical"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/70368","(UMI)AAI8721617"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Electron spin echo (ESE) spectroscopy has been used in the first section of this study to measure weak nitrogen hyperfine coupling in a series of pyridine derivatives loosely bound to bis(benzoylacetonato)copper (Cu(benzac)$\\sb2$) in solution. The ESE technique has also been employed to study weak, long range, unresolved, (matrix) hyperfine interactions in coal. Experimentally, electron nuclear double resonance (ENDOR) and continuous wave electron paramagnetic resonance (cw EPR) techniques are better suited to study strong short range ($$35 GHz) experiments should result in enhanced resolution or allow for more accurate determinations of the zero-field splitting energies in a high spin system. Single crystal spectra as well as doped powder spectra of a variety of copper and iron model compounds were examined using millimeter wave EPR. The exploratory experiments, performed at 4.2 K, made use of neither a sample cavity nor field modulation methods. Even so, the combination of low temperature and high field made it possible to record spectra in single scans.","Made available in DSpace on 2014-12-15T23:18:58Z (GMT). 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The ESE technique has also been employed to study weak, long range, unresolved, (matrix) hyperfine interactions in coal. Experimentally, electron nuclear double resonance (ENDOR) and continuous wave electron paramagnetic resonance (cw EPR) techniques are better suited to study strong short range ($$35 GHz) experiments should result in enhanced resolution or allow for more accurate determinations of the zero-field splitting energies in a high spin system. Single crystal spectra as well as doped powder spectra of a variety of copper and iron model compounds were examined using millimeter wave EPR. The exploratory experiments, performed at 4.2 K, made use of neither a sample cavity nor field modulation methods. Even so, the combination of low temperature and high field made it possible to record spectra in single scans.","Made available in DSpace on 2014-12-15T23:18:58Z (GMT). No. of bitstreams: 1 8721617.pdf: 7548888 bytes, checksum: 5916217423aa119fccd4db45ef9b3b19 (MD5) Previous issue date: 1987","Embargo set by: Seth Robbins for item 70534 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","260 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1987."],"dc:identifier":["http://hdl.handle.net/2142/70368","(UMI)AAI8721617"],"dc:subject":["Chemistry, Physical"],"dc:title":["Electron Spin Echo and Millimeter Wave Epr Studies of Disordered Solids"],"dc:type":["text"],"thesis:degree_discipline":["Chemistry"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:02Z"}